Distillation of gas liquor



A ril 25, 1933. H. KOPPERS DISTILLATION OF GAS LIQUOR Filed March 16. 1951 V fiofixed ammonia is recovered.

H Patented 1933 irEi ivRI'efi korrnnsfornssnmeminent,assrenoninyfmnsiqn sslmma saamg norrnnsconrAmzormELAwAR or rrrrsieunen 'rnmvsyznvnmagmoonromn x lil r n-E 'ewamz I.

ammonia (which liquor, in addition to.

the fixed ammonia compounds, contains also the above-mentioned acids and bases) is treated before the ordinary distillation with lime for the recovery of fixed ammonia, with'a quantityof steam at about 100 C. circulating in a closed cycle; 1 In consequence of the volatility of the abovementioned organic acids and bases steam, these materialsare taken out of the gas liquor. The time in which thegas liquor is in contact With-the steam circulating in aclosed cycle is so arranged that the entire volatile acids and bases "contained v p V sti1l10at, thei inlet 20 at 31 01 the free animus,

nia togtherwithfs omef carbon dioiiide and V sulphurettedzr hydrogen is' drivenfofi and ,;.80

therein are removed.

Theremoval of acids and 'bases from the gas liquor maybe carriedout conveniently in a scrubber through which theliquor to, be treated is pumped, and steam-iis caused to circulate through thescrubber in a closed cycle in counter current to the liquor by 35 means of a rotary pump or in anyother suitable manner. The steam carrying the acids and bases may be taken off from'the' top of the scrubber and" conducted through an: acid and alkali scrubber' 'from which it N i o the bot J thef'stilli W I 1 pas'seslout atithefoutletQGQthrough th pi pe 40 may then be conducted again-int tom of the gas liquor scrubber. I

- Inorder to securecontinuityofthef process the water condensed as, a result of unavoidable heat losses from the steam 'cirg culating inclosed cycle for the recovery of acidsand bases; is continually'replaced by withdrawing steam which is requiredin the closed, cycle circulation from that eIn-,

" 'ployed to heat the gas liquor-still in which f DIsr InnATIoN oreesnrouon I Application filed March 1e, 1931, Seria1Nor-523,101, andin 'GermanyJuneAS; 192 9.; p

very low and, the operationjof thefdi ill iasfa m'at elly e rims s su1tab le;for carry1ng"out the proces of treatg'ad passing o'ut'o d ihe' p v .1

seasoneprc s Qf vehtionjistliatfth a V l 'ganio acid's'l bases is'fefiectedl in a amount gof steam; wrjic 5 howeyer through Jth: gas liquorffor 1a consf J-m d he 0 b ths m i bv 'li' he resale" mentioned fromf the gas 'fliqu m an me In we "d awi -10 r p; a stilt-for,thedistillation"' gasl-iquor forlthe f ryiot' ee a mi a fi rep se t a similaristill :tor, distill ipn owner g gas 'liq 7' Iguor'after ,treatfnent withliinefor the rec ov- .ery offixed a mlmbil ia; l3 represents ascrub -i' .fQreerpu pse@w a whea l q Ilbl' WltllStQfilll and u d rneath this semitbar is" situatedifanother scmbb rilz which,

steam from acidic' and basic vapours vpassresjoutjibftw till at ls hf this in f ayappamt .ipumpe bat e from whence it Qil bber 1 3 p I agomiter passed in f e bOttOiIifo 28 and nt-0' the still 15 at the 111st 27 where a it. isiheatedj with Seaman al ases; 1, j} 1 p1 y 11 'islfiieejd 5111 the. iqpp and the ammonia vvhic *fih t cidieppend a -hot liquoi leaves the apparetfie et bottom of. the still '15, atgthe outlet 31. The

t. V, e ,,.w t. v. j ;g V -.at the' 'in etf37{ and out tthe ioutlet 1, 38 (251- 1ike) frQm thefsteam'erid theldittenf assing, but of the se'rl'lbbeli' at the, 0ut1ev35- is' 'introthe steam 1 il t Aft r Pas in e, s rub e 17-1118 eteami fsfitki h steamenteripg the scru b r: 1'3 p' p' fl9 3 'it "Is lwhil s'tfthe liquor tajfter i emov'atef pours aftep each conte ctwithjthe llq, steam. ci

icy

ith acid} and basm liquors. efter'each eongi jgrami iofpyr dine per Iitr then in-carry? Q s rl'ibberi "13 thttthe, liquor. ileaying j gmtthe iinitlet" 24 willfcointziin go- 'morefthalf @bQlit 1 Thetf bf free "am on a i nto ii itimate contact?fW-ith 4 et th chatxi t v 7 I brought repeatedly into contact with gas I v steam introduced' at the opening '32 andbotliquor andrfreed from acid andwbasie.va 'yfl 

